Having no border with an ocean or a sea is :

An artificial lake created by a dam is a :

Diamonds sold on the black market to pay for violent conflicts are :

Illegal fishing or hunting is :

Land drained by a river and its system of tributaries is :

An area where river currents and ocean tides meet is an:

The wide variety of life on Earth is :

To separate two pieces from one another is called :

The electricity created by flowing water is :

The electricity produced by natural, underground sources of steam is:

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